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The Next Generation Networks (NGN) means All-Optic-Networks needed seamless connectivity between heterogeneous (multi-domain) networks maintained by different Internet Service Providers (ISP). Routing and Wavelength Assignment (RWA) certainly be required for packet routing from source to destination in this All-Optic multi-domain network. To route in a single Autonomous System (AS) Open Shortest Path First (OSPF) lonely can perform, but for a Network with multiple Autonomous Systems (multi-domain) may require an algorithm that satisfies Wavelength Continuity Constraint (WCC) for RWA and also need to maintain communication with Border Gateways. Optical Border Gateway Protocol (OBGP) with OSPF and WCC can meet the requirements. The proposed algorithm is simulated in various scenarios like SISO, SIMO, MISO, and MIMO. Few metrics like best shortest path, the wavelength available for packet routing, path length and latency are identified for mentioned scenarios. [ABSTRACT FROM AUTHOR]